30.72% is the change from 664 to 868
Calculation steps:
[( 868 - 664 ) ÷ 664] x 100 = 30.72%
Formula
Percentage change = [(868 - 664) / 664] x 100
Subtract the new number by the original number
868 - 664 = 204
204 ÷ 664 = 0.3072289156626506
0.3072289156626506 x 100 = 30.72%